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/* Apache License, Version 2.0 */
#include "testing/testing.h"
#include "BLI_color.hh"
namespace blender::tests {
/**
* \name Conversions
* \{ */
TEST(color, ThemeByteToFloat)
{
ColorTheme4b theme_byte(192, 128, 64, 128);
ColorTheme4f theme_float = theme_byte.to_4f();
EXPECT_NEAR(0.75f, theme_float.r, 0.01f);
EXPECT_NEAR(0.5f, theme_float.g, 0.01f);
EXPECT_NEAR(0.25f, theme_float.b, 0.01f);
EXPECT_NEAR(0.5f, theme_float.a, 0.01f);
}
TEST(color, SrgbStraightFloatToByte)
{
ColorTheme4f theme_float(0.75f, 0.5f, 0.25f, 0.5f);
ColorTheme4b theme_byte = theme_float.to_4b();
EXPECT_EQ(191, theme_byte.r);
EXPECT_EQ(128, theme_byte.g);
EXPECT_EQ(64, theme_byte.b);
EXPECT_EQ(128, theme_byte.a);
}
TEST(color, SrgbStraightToSceneLinearPremultiplied)
{
BLI_init_srgb_conversion();
ColorTheme4b theme(192, 128, 64, 128);
ColorSceneLinear4f<eAlpha::Premultiplied> linear =
BLI_color_convert_to_scene_linear(theme).premultiply_alpha();
EXPECT_NEAR(0.26f, linear.r, 0.01f);
EXPECT_NEAR(0.11f, linear.g, 0.01f);
EXPECT_NEAR(0.02f, linear.b, 0.01f);
EXPECT_NEAR(0.5f, linear.a, 0.01f);
}
TEST(color, SceneLinearStraightToPremultiplied)
{
ColorSceneLinear4f<eAlpha::Straight> straight(0.75f, 0.5f, 0.25f, 0.5f);
ColorSceneLinear4f<eAlpha::Premultiplied> premultiplied = straight.premultiply_alpha();
EXPECT_NEAR(0.37f, premultiplied.r, 0.01f);
EXPECT_NEAR(0.25f, premultiplied.g, 0.01f);
EXPECT_NEAR(0.12f, premultiplied.b, 0.01f);
EXPECT_NEAR(0.5f, premultiplied.a, 0.01f);
}
TEST(color, SceneLinearPremultipliedToStraight)
{
ColorSceneLinear4f<eAlpha::Premultiplied> premultiplied(0.75f, 0.5f, 0.25f, 0.5f);
ColorSceneLinear4f<eAlpha::Straight> straight = premultiplied.unpremultiply_alpha();
EXPECT_NEAR(1.5f, straight.r, 0.01f);
EXPECT_NEAR(1.0f, straight.g, 0.01f);
EXPECT_NEAR(0.5f, straight.b, 0.01f);
EXPECT_NEAR(0.5f, straight.a, 0.01f);
}
TEST(color, SceneLinearStraightSrgbFloat)
{
BLI_init_srgb_conversion();
ColorSceneLinear4f<eAlpha::Straight> linear(0.75f, 0.5f, 0.25f, 0.5f);
ColorTheme4f theme = BLI_color_convert_to_theme4f(linear);
EXPECT_NEAR(0.88f, theme.r, 0.01);
EXPECT_NEAR(0.73f, theme.g, 0.01);
EXPECT_NEAR(0.53f, theme.b, 0.01);
EXPECT_NEAR(0.5f, theme.a, 0.01);
}
TEST(color, SceneLinearPremultipliedToSrgbFloat)
{
BLI_init_srgb_conversion();
ColorSceneLinear4f<eAlpha::Premultiplied> linear(0.75f, 0.5f, 0.25f, 0.5f);
ColorTheme4f theme = BLI_color_convert_to_theme4f(linear.unpremultiply_alpha());
EXPECT_NEAR(1.19f, theme.r, 0.01);
EXPECT_NEAR(1.0f, theme.g, 0.01);
EXPECT_NEAR(0.74f, theme.b, 0.01);
EXPECT_NEAR(0.5f, theme.a, 0.01);
}
TEST(color, SceneLinearStraightSrgbByte)
{
BLI_init_srgb_conversion();
ColorSceneLinear4f<eAlpha::Straight> linear(0.75f, 0.5f, 0.25f, 0.5f);
ColorTheme4b theme = BLI_color_convert_to_theme4b(linear);
EXPECT_EQ(225, theme.r);
EXPECT_EQ(188, theme.g);
EXPECT_EQ(137, theme.b);
EXPECT_EQ(128, theme.a);
}
TEST(color, SceneLinearPremultipliedToSrgbByte)
{
BLI_init_srgb_conversion();
ColorSceneLinear4f<eAlpha::Premultiplied> linear(0.75f, 0.5f, 0.25f, 0.5f);
ColorTheme4b theme = BLI_color_convert_to_theme4b(linear.unpremultiply_alpha());
EXPECT_EQ(255, theme.r);
EXPECT_EQ(255, theme.g);
EXPECT_EQ(188, theme.b);
EXPECT_EQ(128, theme.a);
}
TEST(color, SceneLinearByteEncoding)
{
ColorSceneLinear4f<eAlpha::Premultiplied> linear(0.75f, 0.5f, 0.25f, 0.5f);
ColorSceneLinearByteEncoded4b<eAlpha::Premultiplied> encoded = linear.encode();
EXPECT_EQ(225, encoded.r);
EXPECT_EQ(188, encoded.g);
EXPECT_EQ(137, encoded.b);
EXPECT_EQ(128, encoded.a);
}
TEST(color, SceneLinearByteDecoding)
{
ColorSceneLinearByteEncoded4b<eAlpha::Premultiplied> encoded(225, 188, 137, 128);
ColorSceneLinear4f<eAlpha::Premultiplied> decoded = encoded.decode();
EXPECT_NEAR(0.75f, decoded.r, 0.01f);
EXPECT_NEAR(0.5f, decoded.g, 0.01f);
EXPECT_NEAR(0.25f, decoded.b, 0.01f);
EXPECT_NEAR(0.5f, decoded.a, 0.01f);
}
/* \} */
} // namespace blender::tests
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